Check these
http://pinpoint.microsoft.com/en-us/applications/power-web-form-dynamics-crm-internet-lead-capture-tool-12884927566
http://pinpoint.microsoft.com/en-us/applications/web2crm-crm-2011-crm-2013-internet-lead-capture-for-microsoft-dynamics-crm-12884902622
I guess Microsoft Dynamics Marketing which is scheduled for Q2 2014 will also have this feature..
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